package org.eoti.ai.pathfinding.astar.point;

/*
 * The MIT License
 *
 * Copyright (c) 2009 Malachi de AElfweald <malachid@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

import org.eoti.ai.pathfinding.astar.AStarHeuristic;

import java.awt.*;

public class Manhattan
implements AStarHeuristic<PointNode, Point>
{
	public double estimateH( PointNode from, PointNode to)
	{
		Point current = from.getLocation();
		Point destination = to.getLocation();
		double deltaX = Math.abs(current.x - destination.x);
		double deltaY = Math.abs(current.y - destination.y);
		return deltaX+deltaY;
	}
}
